﻿using System;
using System.Web;
using System.Text;

using DQS.Core.Log;

/// <summary>
/// 辅助工具类
/// </summary>
public class Tool
{
    private Tool() { }

    /// <summary>
    /// 获取客户端IP
    /// </summary>
    /// <returns></returns>
    public static string GetClientIP()
    {
        string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
        if (null == result || result == String.Empty)
        {
            result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
        }
        if (null == result || result == String.Empty)
        {
            result = HttpContext.Current.Request.UserHostAddress;
        }
        return result;
    }

    /// <summary>
    /// MD5加密
    /// </summary>
    /// <param name="argPass"></param>
    /// <returns></returns>
    public static string EncryptPasswordByMD5(string argPass)
    {
        return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(argPass, "MD5");
    }

    /// <summary>
    /// 获取汉字首字母
    /// </summary>
    /// <param name="strText"></param>
    /// <returns></returns>
    public static string GetChineseSpell(string strText)
    {
        int len = strText.Length;
        string myStr = "";
        for (int i = 0; i < len; i++)
        {
            myStr += GetSpell(strText.Substring(i, 1));
        }
        return myStr;
    }

    private static string GetSpell(string cnChar)
    {
        cnChar = GetSpeSpell(cnChar);
        byte[] arrCN = Encoding.Default.GetBytes(cnChar);
        if (arrCN.Length > 1)
        {
            int area = (short)arrCN[0];
            int pos = (short)arrCN[1];
            int code = (area << 8) + pos;
            int[] areacode = { 45217, 45253, 45761, 46318, 46826, 47010, 47297, 47614, 48119, 48119, 49062, 49324, 49896, 50371, 50614, 50622, 50906, 51387, 51446, 52218, 52698, 52698, 52698, 52980, 53689, 54481 };
            for (int i = 0; i < 26; i++)
            {
                int max = 55290;
                if (i != 25) max = areacode[i + 1];
                if (areacode[i] <= code && code < max)
                {
                    return Encoding.Default.GetString(new byte[] { (byte)(65 + i) });
                }
            }
            Log.Instance(null).Error("{GetSpell:'" + cnChar + "'}");
            return "#";
        }
        else return cnChar;
    }

    /// <summary>
    /// 特殊字符处理
    /// </summary>
    /// <param name="cnChar"></param>
    /// <returns></returns>
    private static string GetSpeSpell(string cnChar)
    {
        switch (cnChar)
        {
            case "皓": cnChar = "H"; break;
            case "婷": cnChar = "T"; break;
            case "蟠": cnChar = "P"; break;
            case "雯": cnChar = "W"; break;
            case "奕": cnChar = "Y"; break;
            case "玮": cnChar = "W"; break;
        }
        return cnChar;
    }
}
